(I've also posted this on the student board, but I'm particularly interested in whether other teachers find this approach as effective as I have, as well as in alternative approaches to the problem)
I've just written a post that details why joints collapse and a simple practical approach to curing that. However, it also leads on to some issues about freeing the hand of wasted efforts- in a way that is especially relevant to smaller hands.
pianoscience.blogspot.com/2013/06/collapsing-fingers-simple-illustration.htmlAny thoughts would be welcomed.